MTEL Physics: Quantum Theory Chapter Exam

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Page 1

Question 11.Which of the following is an application of wave-particle duality?

The electron microscope

A Newtonian telescope

A CRT television

There are not yet any applications of wave-particle duality.

A regular microscope

Question 22.The portion of light that ___an object up is the portion that's ___by the object:

Reflects, heated

Heats up, absorbed

Absorbs, reflected

Absorbs, heated

Heats up, reflected

Question 33.Scientists questioned the wave theory of light when they saw that increasing the light intensity would only increase the _____ of emitted electrons.

power

energy

volume

number

mass

Question 44.Which of the following does NOT describe an atomic spectrum?

Something we can use to figure out what elements are present in the sun

A full rainbow, such as would be contained inside purely white light

A mixture of light of different wavelengths

Light that contains patterns characteristic of the elements present in a gas

Question 55.In the photoelectric effect, if you increase the brightness (intensity) of light you are shining on a metal, what will happen?

More electrons will be produced.

Lower energy (slower moving) electrons will be produced.

Higher energy (faster moving) electrons will be produced.

Fewer electrons will be produced.

Page 2

Question 66.What is a wavefunction?

A way of describing a classical wave.

An equation that tells you the exact position of a particle.

An equation that tells you the probability of a quantity (like position) having various values.

A wave that functions in a practical way.

A mathematical function that waves up and down.

Question 77.An electron is traveling at 50 meters per second. If the mass of an electron is 9.1 x 10^-31, what is the de-Broglie wavelength of the electron?

5.5 * 10^-31

4.6 * 10^-29 meters

1.46 * 10^-5 meters

69,493 meters

50 meters

Question 88.What is quantum theory?

A body of work in physics that explains the way the universe works on the largest scales.

The theory of quantums.

A body of work in physics that explains the physics surrounding really fast-moving large objects.

A picture of really tiny objects.

A body of work in physics that explains the way the universe works on the tiniest scales.

Question 99.Why do everyday objects not show wave properties?

Because their de-Broglie wavelength is so large; nothing exists of that size.

Because their de-Broglie wavelength is so tiny; nothing exists of that size.

They do, we just can't see it.

They're not moving fast enough.

Because wave-particle duality only applies to small objects.

Question 1010.When studying the photoelectric effect, scientists observed that _____were emitted from metal in response to a beam of light.

neutrons

electrons

protons

photons

positrons

Page 3

Question 1111.Which of the following objects can produce a gravitational force on another object?

A car

A sheet of paper

All of the answers are correct.

A moon

Question 1212.An excited atom is:

An atom that can't emit photons

None of these answers is correct

An atom that cannot emit a wavelength of light

An atom where an electron has moved from a lower energy level to a higher energy level

An atom where an electron has moved from a higher energy level to a lower energy level

Question 1313.In the photoelectric effect, if you decrease the frequency of light you are shining on a metal, what will happen? (Assume you are still above the threshold frequency.)

Fewer electrons will be produced.

More electrons will be produced.

Lower energy (slower moving) electrons will be produced.

Higher energy (faster moving) electrons will be produced.

Question 1414.Who explained the photoelectric effect?

Albert Einstein

Heinrich Hertz

J. J. Thomson

Max Planck

Question 1515.The lowest possible electron energy level is the:

None of these answers is correct

Photon state

Ground state

Charged state

Excited state

Page 4

Question 1616.Which principle states that no two electrons can have the same spin in one orbital?

Pauli's Exclusion Principle

Aufbau Principle

Hund's Rule

Electron Capacity Principle

Question 1717.The four most basic forces which all others can be broken down into are called the four fundamental forces of nature. Which of the four fundamental forces is responsible for the force created by a golf club striking a golf ball?

Gravitational force

Weak force

Strong force

Electromagnetic force

Question 1818.Which of the following is NOT an application of quantum theory in the real world?

Lasers in DVD players

Sensors in digital cameras

Flat-screen televisions

Lasers in blu-ray players

Magnifying glasses

Question 1919.Another guideline to determine electron configuration, which shows the exact order that the orbitals are supposed to be filled, is called:

None of these are correct

spdf chart

Periodic Table

Diagonal Rule

Question 2020.Which of the following is an example of an absorption spectrum?

Page 5

Question 2121.What type of spectrum is the following image an example of?

Emission spectrum

Continuous spectrum

All the answers are correct.

Absorption spectrum

Question 2222.A hypothetical and idealized object, one that is a perfect absorber of all wavelengths of radiation that fall on it, is called a:

Whitebody

Dark energy

Dark matter

Blackbody

Blacktop

Question 2323.The ground state electron configuration is the arrangement of electrons around the nucleus of an atom with _____ energy levels.

similar

None of these are correct

lower

higher

Question 2424.Which of these would be the better emitter of radiation?

Ice

A blacktop

Coal

Snow

A blackbody

Question 2525.The amount of energy necessary to pull an electron away from an atom is known as:

Binding energy

Ground state energy

Electromagnetic energy

Excitation energy

Photon energy

Page 6

Question 2626.Snow is a good ___of light but a bad ___of light:

Emitter, reflector

Blackbody, reflector

Reflector, absorber

Absorber, reflector

None of these answers is correct.

Question 2727.An object that is a good ___of radiation is also a good __of radiation:

Absorber, emitter

Reflector, absorber

Absorber, reflector

Emitter, absorber

Reflector, emitter

Question 2828.An atom:

All of these answers are correct

Has electrons in defined energy levels

Can absorb and emit multiple wavelengths of light

Has a nucleus where neutrons and protons reside

Has multiple permitted energy levels

Question 2929.It is useful to think of a photon as a packet of

mass

power

volume

waves

energy

Question 3030.Using what you know about the electromagnetic force, what happens when a neutron comes near another neutron?

They attract each other.

The charges on the neutrons change from negative to positive.

Nothing

They repel each other.

MTEL Physics: Quantum Theory Chapter Exam Instructions

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appear. Click it to see your results. You will lose your work if you close or refresh this page. Good luck!